I don't use Fabreze either. My cat Mollie Rose has kitty asthma and don't want to exascerbate it. I do use a product called Nok-Out. It is specially made for pets. It gets out all odors (including kitty pee and spraying) both in the air and in fabrics, furniture, carpeting, etc.

BTW Naomi,

I've used it for the filters on the top of my litter box
Great idea!